Listing all results (379)

Populations

What’s the first thing that pops into your mind when you read the word population? Most likely it’s the ever-increasing human population on earth. The term population isn’t just used to describe humans; it includes other animals, plants and microbes too. These resources will help you learn more about how...

Inside the brain poster (colour/black and white)

Our brains contain some 86 billion neurons, or nerve cells, which communicate via junctions called synapses. At these junctions, neurons are just 20 nm apart. Inside each of our heads you’ll find one brain, billions of neurons and trillions of synapses which...

Immune System

This resource looks at several aspects of the immune system including: • The non-specific immune response • Specific immune response and antigen recognition • T cells and B cells • Autoimmune disease and allergic responses • Monoclonal antibodies • Long term immunity and vaccination There is a section which...

Inside the Brain

These resources from the Wellcome Trust explore how imaging research has changed the way we look inside one of our most fascinating organs, the brain. The accompanying lesson ideas provides related activities and ideas for investigations or extended project qualification (EPQ). There is useful background...

Enzymes are Proteins

Enzymes are proteins that speed up the reactions by acting as catalysts. They increase the rate of reaction without being consumed or permanently altered by themselves. In Greek enzymes are divided into sections “En” which means “in” and second part is “zyme” means living. The study of enzymes is known as...

Electrophoresis gel with annotation

Di-deoxy sequencing is a way to determine the order of bases (A,C,G and T) in a piece of DNA. A set of 4 lanes (one for each base) is needed to sequence any given piece of DNA. Wherever a black
band appears in a particular lane that base is present. By reading off the order of bands across the four lanes the...

Di-deoxy sequencing gel with annotation

Di-deoxy sequencing is a way to determine the order of bases (A,C,G and T) in a piece of DNA.  A set of 4 lanes (one for each base) is needed to sequence any given piece of DNA. Wherever a black band appears in a particular lane that base is present. By reading off the order of bands across the four lanes the...

Automated DNA sequencing output

The output from an automated DNA sequencing robot used by the Human Genome Project to determine the complete human DNA sequence. Each peak shows the presence of a particular base. The sequence of bases in a given stretch of DNA can therefore be read from the order of the peaks along the trace. The sequences of...

Chromosomes in metaphase

An image representing human chromosomes in metaphase. Atomic Force Microscope image of human chromosomes in a metaphase spread.

This resource is part of the Post 16 genetics and ...

DNA replication theory

Diagramatic representation of the replication of DNA. This is the process by which the cell makes a copy of its existing DNA before it divides. This therefore ensures that each new cell receives a full complement of DNA. The DNA polymerase enzyme can only add new bases in the 5'-3' direction. This leads to...

Pages

View all publishers